[RFC PATCH v2 1/2] check-atomiscs: stop build if CONFIG_WERROR=y

[Vincent Mailhol]

If CONFIG_WERROR=y, stop the build if one of the generated atomics
header in include/linux/atomic/* is modified by returning an error
instead of a warning.

If CONFIG_WERROR is not set, behavior is unchanged (let the build
continue).

Signed-off-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
---
 scripts/atomic/check-atomics.sh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/scripts/atomic/check-atomics.sh b/scripts/atomic/check-atomics.sh
index 0e7bab3eb0d1..56f9e753bc74 100755
--- a/scripts/atomic/check-atomics.sh
+++ b/scripts/atomic/check-atomics.sh
@@ -26,8 +26,13 @@ while read header; do
 	NEWSUM="${NEWSUM%% *}"
 
 	if [ "${OLDSUM}" != "${NEWSUM}" ]; then
-		printf "warning: generated include/${header} has been modified.\n"
+		if grep -q CONFIG_WERROR=y .config; then
+			printf "error: generated include/${header} has been modified.\n"
+			exit 1
+		else
+			printf "warning: generated include/${header} has been modified.\n"
+		fi
 	fi
 done
 
-exit 0
+exit $?
-- 
2.35.1